Fuel cell membrane electrode preparation process and hot-pressing mould thereof

Abstract

The invention belongs to the field of fuel cell membrane electrode manufacturing and relates to a fuel cell membrane electrode preparation process and a hot-pressing mould thereof. The hot-pressing mould thereof comprises a bottom plate, a lower positioning plate, an upper positioning plate, a positioning frame, a pressure block, a movable cutting die bottom plate, a lower positioning plate, an initial membrane electrode polyester frame, an upper positioning plate and a pressure block in sequential arrangement. The pressure block is positioned in a positioning frame through hole in the centerof the positioning frame; a first gas diffusion layer and a second gas diffusion layer are positioned in a lower positioning plate through hole and an upper positioning plate through hole respectively; the cutting die is formed by inlaying a bladed into a plate, and when the cutting die moves downwards, the blade penetrates a gap between the positioning frame through hole and the pressure block tobe pressed on the upper positioning plate. By positioning pins for fixing a membrane electrode prone to distortion and deformation, displacement in hot pressing is avoided; by design of the blade shape of the cutting die and a groove shape of the bottom plate, membrane electrode components in any shapes can be manufactured; by use of the positioning plates instead of shallow grooves for fixing the gas diffusion layers, simplicity in processing and low replacement cost are realized.

Description

technical field [0001] The invention relates to a fuel cell membrane electrode preparation process and a hot pressing mold thereof, belonging to the field of fuel cell membrane electrode production. Background technique [0002] The fuel cell membrane electrode assembly includes a membrane electrode with a polyester frame, and two gas diffusion layers bonded on its upper and lower planes, a total of three components. In order to ensure the maximum utilization of the effective area of ​​the membrane electrode, the alignment of the three components needs to be accurate when combined. [0003] Patent 1 Publication No. [CN103887519A] discloses a membrane electrode pressing die and its operation method. The mold has through holes and grooves on the upper and lower positioning plates to position the gas diffusion layer and membrane electrodes, but the membrane electrodes with frames are easy to twist and deform, and cannot be laid flat in the grooves, resulting in displacement du...

AI Technical Summary

Problems solved by technology

[0005] The shortcomings of the traditional fuel cell membrane electrode preparation process: ① cannot fix the twisted and deformed membrane electrode;

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